CN105186276A - Vertical polarization output pulse solid laser - Google Patents
Vertical polarization output pulse solid laser Download PDFInfo
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- CN105186276A CN105186276A CN201510153120.XA CN201510153120A CN105186276A CN 105186276 A CN105186276 A CN 105186276A CN 201510153120 A CN201510153120 A CN 201510153120A CN 105186276 A CN105186276 A CN 105186276A
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Abstract
The invention relates to a semiconductor pumped vertical polarization output pulse solid laser. The laser pulse repetition frequency can be raised greatly in a condition that the laser beam quality is ensured. The technical scheme is as follows: a special laser resonant cavity is designed, polarization lasers vertical to each other can oscillate in the resonant cavity, simultaneous output of polarization lasers vertical to each other is achieved, and influences of the thermal depolarization effect in a high power working condition of a pulse solid laser are avoided. In addition, semiconductor laser pumping is employed, the waste heat amount in laser work is reduced, and influences of the thermal lens effect are reduced. When the vertical polarization output pulse solid laser is compared with a polarization output pulse solid laser, the laser conversion efficiency is high, the beam quality is good, the pulse repetition frequency is high, and the vertical polarization output pulse solid laser can be used in fields of photoelectric confrontation, photoacoustic flaw detection, cutting and marking of specific materials and the like.
Description
Technical field
The present invention relates to a kind of semiconductor pumped vertical polarization and export pulsed solid stale laser.
Background technology
Nd:YAG pulsed solid stale laser is in laser ranging, the fields such as laser irradiation are widely used, within this type of laser is mostly operated in 50Hz repetition, within pulse energy 1J, but along with the raising of pulse repetition frequency, this type of laser of traditional design is because the impact of thermal depolarization effect, beam quality can sharply decline, the special cavity resonator structure of the present invention's design is when ensureing laser beam quality and conversion efficiency, significantly improve pulse laser repetition rate, the above high light beam quality Laser output of pulsed solid stale laser 100Hz can be realized, application for this type of laser high repetition frequency provides high light beam quality laser solution.
Summary of the invention
The object of the invention is: when ensureing laser beam quality and conversion efficiency, significantly improving pulse laser repetition rate, realizing the above high light beam quality work of pulsed solid stale laser 100Hz.
In order to the high light beam quality realizing the more Gao Zhongying of pulsed solid stale laser exports, the present invention adopts a kind of brand-new cavity resonator structure, mutually perpendicular polarization laser can both be vibrated starting of oscillation in resonant cavity, realize orthogonal polarization laser to export simultaneously, avoid the impact of the Depolarization in pulsed solid stale laser high-power operation situation; Employing semiconductor laser pumping decreases the used heat total amount in laser work in addition, decreases the impact of thermal lensing effect, realizes the above high light beam quality work of pulsed solid stale laser 100Hz.
This laser is made up of laser body, laserresonator, pump module and crystal cooling system.Architectural feature is: laserresonator, pump module and crystal cooling system are all contained on laser body.Laserresonator is made up of outgoing mirror, laser crystal, polarizer two panels, electro-optic Q switch, 45 ° of speculum two panels; Pump module clings to bar by semiconductor pumped laser, heat sink, TEC, fin and fan form.Crystal cooling system is made up of water pump, quartz glass tube.
Semiconductor pumped laser bar bar pumped laser crvstal excitation laser in resonant cavity light path is mutually perpendicular two-way laser in the punishment of first polarizer, the P polarised light of transmission and the S polarised light of reflection respectively, P polarised light becomes S polarised light through electro-optic Q switch rear polarizer direction polarization 90 °, is entered laser crystal complete laser generation loop after two panels 45 ° of speculums by the reflection of two panels polarizer; The S polarised light of reflection enters electro-optic Q switch after second polarizer and two panels 45 ° of speculums, and S polarised light becomes P polarised light through electro-optic Q switch rear polarizer direction polarization 90 degree, thus enters laser crystal through first polarizer and complete laser loop.Electro-optic Q switch is not in making alive situation, and P polarised light and S polarised light do not change through electro-optic Q switch polarization state, and laser cannot complete loop, and laserresonator is in off state; Under electro-optic Q switch adding 1/2 wave voltage situation, P polarised light and S polarised light all occur 90 ° through electro-optic Q switch polarization state, and laser completes loop, and laserresonator is in adjusts Q dynamic behavior.
Semiconductor pumped laser bar bar around laser crystal be evenly encapsulated in heat sink on, TEC two working face is fitted tightly by heat-conducting silicone grease with heat sink and fin respectively, keep good heat transfer, TEC accurately controls the temperature being encapsulated in heat sink upper bar bar, the centre wavelength of the pumping laser making it launch is 808nm, the used heat of semiconductor pumped laser bar bar and system is transmitted on fin, the most always by fan cooling.
Laser crystal is set with by quartz glass tube, and water pump drives liquid circulation by quartz glass tube cooling laser crystal.Laser body is designed with heat of cooling case, can ensure the cooling needs of laser crystal.
The present invention compared with prior art, there is following beneficial effect: (1), compared with the pulsed solid stale laser of traditional design, invention achieves vertical polarization laser and exports simultaneously, avoid the impact of thermal depolarization effect, repetition rate is higher, conversion efficiency is higher, beam quality is better.(2), relative to the pulsed solid stale laser of traditional xenon flash lamp pumping, invention adopts semiconductor laser pumping, and can realize the integrated design of laser and cooling system, laser volume is compacter, power consumption is lower.
Accompanying drawing explanation
Fig. 1 is the present invention: a kind of vertical polarization exports pulsed solid stale laser.
Fig. 2 is the cut-away view of this pulsed solid stale laser.
In figure: 1, laser crystal; 2-1, heat sink A; 2-2, heat sink B; 3, quartz glass tube; 4, outgoing mirror; 5-1, fin A; 5-2, fin B; 6-1, fan A; 6-2, fan B; 7-1, polaroid A; 7-2, polarizer B; 8-1,45 ° of speculum A; 8-2,45 ° of speculum B; 9, electro-optic Q switch; 10, water pump; 11, laser body; 12-1, laser body cover plate A; 12-2, laser body cover plate B; 12-3, laser body cover plate C; 12-4, laser body cover plate; 13, semiconductor pumped laser bar bar; 14, TEC.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described
According to Fig. 1, vertical polarization provided by the invention exports pulsed solid stale laser and is made up of laser body 11, laserresonator, pump module and crystal cooling system.Architectural feature is: laserresonator, pump module and crystal cooling system are all contained in laser body 11.Laserresonator is made up of outgoing mirror 4, laser crystal 1, polarizer two panels 7-1,7-2, electro-optic Q switch 9,45 ° of speculum two panels 8-1,8-2; Pump module clings to bar 13, heat sink 2-1,2-2, TEC14, fin 5-1,5-2 and fan 6-1,6-2 by semiconductor pumped laser and forms.Crystal cooling system is made up of water pump 10, quartz glass tube 3.
Described laserresonator places laser crystal 1, polarizer 7-1, electro-optic Q switch 9,45 ° of speculum 8-1 forward successively from outgoing mirror 4, polarizer 7-1 reflected light path is placed polarizer 7-2,45 ° of speculum 8-2 successively, regulate 45 ° of speculums 8-1,8-2, make to launch light path and projecting light path coincidence;
The semiconductor pumped laser bar bar 13 of described pump module is evenly encapsulated on heat sink 2-1,2-2 centered by laser crystal axis, heat sink 2-1,2-2 with about laser crystal axis to old, TEC14 is arranged on heat sink 2-1,2-2 and between fin 5-1,5-2, good thermal conductivity is kept by heat-conducting silicone grease, fan 6-1,6-2 are arranged on heat radiation 5-1,5-2 on the upper side, appropriate design wind path keeps good heat-sinking capability, and heat sink 2-1,2-2, fin 5-1,5-2 and fan 6-1,6-2 place with laser crystal symmetry.
The water pump 10 of described crystal cooling system drives the cooling fluid in laser body 11 to flow through quartz glass tube 3 by pipeline, the laser crystal 1 of coolant jacket in quartz glass tube 3, quartz glass tube 3 and laser crystal 1 are coaxially arranged in laser body 11, and realize waterway seal.Laser body cover plate 12-1 seals cooling fluid casing.
Described laser body cover plate 12-2,12-3 sealed laser resonant cavity, ensures the close property of dirt in resonant cavity and drying property;
Described laser body cover plate 12-4 seals pump module, ensures the close property of dirt and the drying property of pump module;
Semiconductor pumped laser bar bar 13 pumped laser crvstal 1 excitation laser in resonant cavity light path is punished as mutually perpendicular two-way laser at polarizer 7-1, the P polarised light of transmission and the S polarised light of reflection respectively, P polarised light becomes S polarised light through electro-optic Q switch 9 rear polarizer direction polarization 90 °, is entered laser crystal 1 complete laser generation loop after two panels 45 ° of speculums 8-1,8-2 by two panels polarizer 7-2,7-1 reflection; The S polarised light of reflection enters electro-optic Q switch 9 after polarizer 7-2 and two panels 45 ° of speculums 8-1,8-2, S polarised light becomes P polarised light through electro-optic Q switch rear polarizer direction polarization 90 degree, thus enter laser crystal through polarizer 7-1 and complete laser loop, polarizer 7-1 reflected light path and transmitted light path overlap.
Electro-optic Q switch 9 is not in making alive situation, and P polarised light and S polarised light do not change through electro-optic Q switch 9 polarization state, and laser cannot complete loop, and laserresonator is in off state; Under electro-optic Q switch 9 adding 1/2 wave voltage situation, P polarised light and S polarised light all occur 90 ° through electro-optic Q switch polarization state, and laser completes loop, and laserresonator is in adjusts Q dynamic behavior.
Claims (5)
1. a vertical polarization exports pulsed solid stale laser, its special card is: laser is made up of laser body 11, laserresonator, pump module and crystal cooling system, and laserresonator, pump module and crystal cooling system are all contained in laser body 11.Laserresonator is made up of outgoing mirror 4, laser crystal 1, polarizer two panels 7-1,7-2, electro-optic Q switch 9,45 ° of speculum two panels 8-1,8-2; Pump module clings to bar 13, heat sink 2-1,2-2, TEC14, fin 5-1,5-2 and fan 6-1,6-2 by semiconductor pumped laser and forms; Crystal cooling system is made up of water pump 10, quartz glass tube 3.
2. a kind of vertical polarization according to claim 1 exports pulsed solid stale laser, it is characterized in that described laserresonator places laser crystal 1, polarizer 7-1, electro-optic Q switch 9,45 ° of speculum 8-1 with this forward from outgoing mirror 4, polarizer 7-1 reflected light path is placed polarizer 7-2,45 ° of speculum 8-2 successively, regulate 45 ° of speculums 8-1,8-2, reflected light path and transmitted light path are overlapped.
3. a kind of vertical polarization according to claim 1 exports pulsed solid stale laser, it is characterized in that the semiconductor pumped laser bar bar 13 of described pump module is evenly encapsulated in heat sink 2-1 centered by laser crystal axis, on 2-2, heat sink 2-1, 2-2 with about laser crystal axis to old, TEC14 is arranged on heat sink 2-1, 2-2 and fin 5-1, between 5-2, good thermal conductivity is kept by heat-conducting silicone grease, fan 6-1, 6-2 is arranged on fin 5-1, on 5-2, heat sink 2-1, 2-2, fin 5-1, 5-2 and fan 6-1, 6-2 places with laser crystal symmetry.
4. a kind of vertical polarization according to claim 1 exports pulsed solid stale laser, it is characterized in that the water pump 10 of described crystal cooling system drives the cooling fluid in laser body 11 to flow through quartz glass tube 3 by pipeline, the laser crystal 1 of coolant jacket in quartz glass tube 3, quartz glass tube 3 and laser crystal 1 are coaxially arranged in laser body 11, and realize waterway seal.
5. a kind of vertical polarization according to claim 1 exports pulsed solid stale laser, it is characterized in that described laser body cover plate 12-2,12-3 sealed laser resonant cavity, ensures the close property of dirt in resonant cavity and drying property; Described laser body cover plate 12-4 seals pump module, ensures the close property of dirt and the drying property of pump module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510153120.XA CN105186276B (en) | 2015-04-02 | 2015-04-02 | A kind of vertical polarization exports pulsed solid stale laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510153120.XA CN105186276B (en) | 2015-04-02 | 2015-04-02 | A kind of vertical polarization exports pulsed solid stale laser |
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| Publication Number | Publication Date |
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| CN105186276A true CN105186276A (en) | 2015-12-23 |
| CN105186276B CN105186276B (en) | 2018-04-27 |
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| CN201510153120.XA Expired - Fee Related CN105186276B (en) | 2015-04-02 | 2015-04-02 | A kind of vertical polarization exports pulsed solid stale laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397976A (en) * | 2020-11-11 | 2021-02-23 | 西南石油大学 | Laser with quick heat dissipation function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030128732A1 (en) * | 2001-12-28 | 2003-07-10 | Communications Res. Lab., Ind. Admin. Inst. | Laser oscillator |
| CN101055401A (en) * | 2007-05-25 | 2007-10-17 | 北京工业大学 | Whole-solid kHz picosecond laser pulse regeneration amplifier |
| CN104201553A (en) * | 2014-09-22 | 2014-12-10 | 山东大学 | Dual-wavelength tunable solid laser and application thereof |
-
2015
- 2015-04-02 CN CN201510153120.XA patent/CN105186276B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030128732A1 (en) * | 2001-12-28 | 2003-07-10 | Communications Res. Lab., Ind. Admin. Inst. | Laser oscillator |
| CN101055401A (en) * | 2007-05-25 | 2007-10-17 | 北京工业大学 | Whole-solid kHz picosecond laser pulse regeneration amplifier |
| CN104201553A (en) * | 2014-09-22 | 2014-12-10 | 山东大学 | Dual-wavelength tunable solid laser and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| YONG CHENG等: "Mutual injection phase locking coherent combination of solid-state lasers based on corner cube", 《OPTICS LETTERS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397976A (en) * | 2020-11-11 | 2021-02-23 | 西南石油大学 | Laser with quick heat dissipation function |
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| CN105186276B (en) | 2018-04-27 |
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